| # SPDX-License-Identifier: GPL-2.0 |
| |
| # List of files in the vdso, has to be asm only for now |
| |
| ARCH_REL_TYPE_ABS := R_PPC_JUMP_SLOT|R_PPC_GLOB_DAT|R_PPC_ADDR32|R_PPC_ADDR24|R_PPC_ADDR16|R_PPC_ADDR16_LO|R_PPC_ADDR16_HI|R_PPC_ADDR16_HA|R_PPC_ADDR14|R_PPC_ADDR14_BRTAKEN|R_PPC_ADDR14_BRNTAKEN|R_PPC_REL24 |
| include $(srctree)/lib/vdso/Makefile |
| |
| obj-vdso32 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o |
| |
| ifneq ($(c-gettimeofday-y),) |
| CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y) |
| CFLAGS_vgettimeofday.o += $(DISABLE_LATENT_ENTROPY_PLUGIN) |
| CFLAGS_vgettimeofday.o += $(call cc-option, -fno-stack-protector) |
| CFLAGS_vgettimeofday.o += -DDISABLE_BRANCH_PROFILING |
| CFLAGS_vgettimeofday.o += -ffreestanding -fasynchronous-unwind-tables |
| CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) |
| endif |
| |
| # Build rules |
| |
| ifdef CROSS32_COMPILE |
| VDSOCC := $(CROSS32_COMPILE)gcc |
| else |
| VDSOCC := $(CC) |
| endif |
| |
| CC32FLAGS := |
| ifdef CONFIG_PPC64 |
| CC32FLAGS += -m32 |
| KBUILD_CFLAGS := $(filter-out -mcmodel=medium -mabi=elfv1 -mabi=elfv2 -mcall-aixdesc,$(KBUILD_CFLAGS)) |
| endif |
| |
| targets := $(obj-vdso32) vdso32.so.dbg vgettimeofday.o |
| obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) |
| |
| GCOV_PROFILE := n |
| KCOV_INSTRUMENT := n |
| UBSAN_SANITIZE := n |
| KASAN_SANITIZE := n |
| |
| ccflags-y := -shared -fno-common -fno-builtin -nostdlib \ |
| -Wl,-soname=linux-vdso32.so.1 -Wl,--hash-style=both |
| asflags-y := -D__VDSO32__ -s |
| |
| obj-y += vdso32_wrapper.o |
| targets += vdso32.lds |
| CPPFLAGS_vdso32.lds += -P -C -Upowerpc |
| |
| # link rule for the .so file, .lds has to be first |
| $(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday.o FORCE |
| $(call if_changed,vdso32ld_and_check) |
| |
| # assembly rules for the .S files |
| $(obj-vdso32): %.o: %.S FORCE |
| $(call if_changed_dep,vdso32as) |
| $(obj)/vgettimeofday.o: %.o: %.c FORCE |
| $(call if_changed_dep,vdso32cc) |
| |
| # Generate VDSO offsets using helper script |
| gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh |
| quiet_cmd_vdsosym = VDSOSYM $@ |
| cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ |
| |
| include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE |
| $(call if_changed,vdsosym) |
| |
| # actual build commands |
| quiet_cmd_vdso32ld_and_check = VDSO32L $@ |
| cmd_vdso32ld_and_check = $(VDSOCC) $(c_flags) $(CC32FLAGS) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^) ; $(cmd_vdso_check) |
| quiet_cmd_vdso32as = VDSO32A $@ |
| cmd_vdso32as = $(VDSOCC) $(a_flags) $(CC32FLAGS) -c -o $@ $< |
| quiet_cmd_vdso32cc = VDSO32C $@ |
| cmd_vdso32cc = $(VDSOCC) $(c_flags) $(CC32FLAGS) -c -o $@ $< |
